精品新人教版五下数学四单元《分数的意义》张齐华.pptVIP

分数的意义五年级六班

把看作“1”2个“1”是24个“1”是4

把看作单位“1”5个“1”是5

把看作单位“1”6个“1”是6

1米

把看做单位“1”···5················3·······························1······························

把看做单位“1”······（）····························（）····························（）

把看做单位“1”1米····（）·····························（）······························（）

把看做单位“1”·······················（）·······（）·······················（）

把看做单位“1”······（）····························（）····························（）41

把看做单位“1”1米····（）··························（）···························（）31

把看做单位“1”····················（）······（）···················（）21

01单位“1”

01单位“1”2

01单位“1”23

根据课前发的资料，选择适宜的分数先分一分，再涂色表示出这些分数吗？

把〔〕看作单位“1”，平均分成〔〕份，涂色局部表示了这样的〔〕份。

涂色局部表示哪个分数？

生活中的分数我国小学生中，睡眠缺乏的人数大约占总人数的2/3。小学生每天的睡眠时间应占一天总时间(24小时)的3/8。我希望：我国小学生中睡眠缺乏的人数占总人数的〔〕/〔〕